如何在单击按钮时使linedit准备好输入内容

from PyQt5.QtWidgets import QApplication, QWidget, QLineEdit, QPushButton, QVBoxLayout
import sys

class MyWidget(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle("LineEdit准备输入内容示例")

        # 创建一个LineEdit和一个按钮
        self.lineEdit = QLineEdit()
        self.button = QPushButton("点击我准备输入内容")

        # 将按钮的点击事件与处理函数关联
        self.button.clicked.connect(self.prepareInput)

        # 创建一个垂直布局，并将LineEdit和按钮添加到布局中
        layout = QVBoxLayout()
        layout.addWidget(self.lineEdit)
        layout.addWidget(self.button)

        self.setLayout(layout)
        self.show()

    def prepareInput(self):
        # 设置LineEdit获取焦点
        self.lineEdit.setFocus()

        # 清空LineEdit中的内容
        self.lineEdit.clear()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    widget = MyWidget()
    sys.exit(app.exec_())